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Researchers hot on the trail of brain cell degeneration

A research team headed by Academy Research Fellow Michael Courtney has identified a new molecular pathway in neurons. The pathway is a factor in the degeneration of brain cells, which in turn plays an important role in neurological conditions and diseases, such as Alzheimer's disease, epilepsy and stroke. Courtney and his team, based at the A. I. Virtanen Institute of the University of Kuopio, joined forces with Docent Eleanor Coffey's team at the Turku Centre for Biotechnology to carry out the study as part of a series of successful collaborations between the two teams. The results of their study are published in the latest issue of Nature Neuroscience.

In a number of neurodegenerative diseases, neurons in the brain are over-stimulated, which triggers programmed cell death, or apoptosis. The study shows that the Rho protein, which has long been recognised as an important player in cancer formation, also plays a key role in the destruction of neurons in disease.

"These surprising findings add an entire pathway to the map of neurodegenerative signalling processes," says Courtney. "This area of investigation could therefore offer novel therapeutic strategies for neurodegenerative diseases".

Targeting molecular signals

How neurons actually die has been unclear. It is likely that it is associated with a variety of different mechanisms. Research has shown that the destruction of cells be over-stimulation depends on excess entry of calcium into the cells. Researchers have long been trying to map how cells generate destruction signals in response to the calcium, in the hope of finding new targets for drug design.

The object of the study, the Rho protein, belongs to a family of proteins able to influence signals that had been linked to cell degeneration. The two teams' analysis demonstrated that over-stimulation causes activation of Rho as well as cell destruction signals. Blocking Rho activity by genetic modification k
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Source:Academy of Finland


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